Sam's phone number is 785 878 3405. He might have the parts you need but when i talked to him a week or two ago he said that anymore the buses that he is parting out are all about 10 years old or newer.

Im not sure of the gear ratio , long legs pretty lazy on the hills would be nice to find a source for a rebuilt or a new one here in Canada . I have a donner 9 here in my yard i could use the diff out of that one but not sure how much life in it , if need be thats what ill do .Thank you

luvrbus,With the 23,000lb rear, I never changed the rear gear set after I totally rebuilt it, stayed 3.7, just used the RT910 then the RTO910, if I had the money, would have loved the play the 3.33, the key to the MCI rear gear is to stick with the 10 tooth pinion. Have forgotten the name of the factory rep for that rear, he had the MC7 also, claimed with the 10 tooth pinion, you have the very strongest gear setup. Just different ring gear tooth count for different ratios.He & I had a very interesting talk about how to tell if damage to the rear was warranty or abuse.Have been lucky to have met some very talented guys and got some stories